Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Physical dimension specified
Patent
1990-02-23
1991-09-03
Cashion, Jr., Merrell C.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Physical dimension specified
428447, B32B 904
Patent
active
050453912
ABSTRACT:
Disclosed are image release sheets which comprise a dielectric coated substrate and a silicone-urea block polymer coating for the dielectric substrate. The silicone-urea block polymer functions as a release coating when the image sheet is used in electrographic processes. Excellent transfer of an image from a donor element, comprising the silicone-urea block polymer as a release coating, to a receptor substrate occurs. In a preferred embodiment, a pH sensitive indicator such as thymolphthalein can be added to the release coating in order to monitor the thickness of the coating.
REFERENCES:
patent: 4600673 (1986-07-01), Hendrickson et al.
patent: 4656087 (1987-04-01), Lubianez et al.
patent: 4772526 (1988-09-01), Kan et al.
Polymer, vol. 25, pp. 1800-1816 12/84.
Brandt Patricia J. A.
Farm Raymond J.
Wang Paul J.
Cashion Jr. Merrell C.
Follett Robert J.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
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